Lubricating-pulley.



PATENTED MAY 1'7, 1904. A. N. 6L C. B. BORQUIST.

LUBRIGATING PULLEY.

l No. 760,373.

APPLIOATIUN FILED JULY 29, 1903.

NO MODEL.

mwN/44u-- i. 7.

lituvssrs:

WMM'

UNITED STATES Patented May 17, 1904.

PATENT OEEICE.

AXEL N. BORQUIST AND CHARLES B. BORQUIST, OF PORTLAND, OREGON.

LUBRICATING-PULLEY.

SPECIFICATION forming part of Letters Patent No. 760,378, dated May 1'7,1904.

Application filed July 29, 1903. Serial No. 187,502. (No model.)

To a/ZZ whom it may concern:

Be it known that we, AXEL N. Bonouisr and CHARLES B. BoRQUrsT, citizensof the United States, and residents of Portland, county of Multnomah,and State of Oregon, have invented a new and useful Improvement inLubricating-Pulleys, of which the following is a specilication,reference being had to the accompanying drawings.

Our invention has for its object to provide pulley-blocks to be used inconnection with heavy work-such as logging, for example--u with meansfor keeping the same lubricated, such lubricating device, however', tobe of very strong construction, so as not to be readily broken in therough usage which the pulley has to withstand in work.

wWe accomplish our object by the construction shown in the drawingsreferred to and hereinafter described and claimed.

In the drawings, Figure 1 is a vertical crosssection of a pulley-blockprovided with our improved lubricating means. Fig. 2 is a partialsection of Fig. l on a line m m; and Fig. 3 is a left end view of thepulley-pin, also showing the set-collar The letters designate the partsreferred to.

The shell of our pulley is of common construction, comprising sides a,a, on the exterior of which are riveted straps o I) by rivets e e Thestraps b Z) are provided with eyes c c, in which are secured the linksof the suspending-chain d. The sheave f rotates on an axial pin g,inserted through perforations in the straps and the sides a a. Such ping is of the construction observable from Fig. l. On the left-handportion thereof is made an enlargement or boss g', having a peripheralthread and an integral square collar g2. Vhen the pin is insertedthrough the shell and pulley, the collar g2 will abut against therivethead e', as illustrated in Fig. 2, thereby holding such pin againstturning with the sheave. The pin is further made with an oil-hole 7i,having right-angle course it leading to the exterior of the pin andproviding an outlet for the oil to lubricate the sheavef. The entranceto the oil-hole is made cup-like. On

the threaded boss g' is screwed a set-collar 1f. The oil-hole of the ping is covered by a cap j.

The collar z' is hexagonal and is a little larger in cross-section thanthe cap j,so that the blows to which such cap would be subjected duringworking would to a great extent be received by the rim of the collar e'instead of the rim of the cap j for the purpose of preventing the latterfrom being turned by such blows. In the chamber provided by the capjover the mouth of the oilhole is inserted heavy lubricant. In case thesheave is insufiicientlylubricated and the axial pin becomes heatedaportion of such heavy lubricant would become liquid and be fed bygravity through the oil-hole 71.. As the body of the lubricant containedwithin the cap t7' is consumed the cap is screwed up, so as to forcemore lubricant into the oil-hole, the collar e' being adjusted to meetthe circumstances. Thc pin g is held in place by the usual nut 7e.Without the set-collar the cap j would be liable to be turned by theknocks of the pulley-block, with the result of either turning such capoff or turning' the same up and forcing an undue quantity of lubricantthrough the oil-hole of the pin. This the said collar prevents, forafter the cap l7' has been properly adjusted the said collar is screwedup tight against it and holds it against turn ing. The square integralcollar y" provides a convenient means,in connection with the rivetheade', to hold the pin g against turning, which is essential in order tokeep the angular course it in its proper vertical position.

Having fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

1. Inapulley, an axial pin,one end of which is made with an enlargementor boss, provided with a peripheral thread and a longitudinal oil-hole,terminating in a course L; a cap screwing on said threaded boss andconstitut ing a lubricant-storing chamber, a threaded set-collar forlocking such cap in its adjusted position, such set-collar being oflarger crosssection than the rim of the cap, to fend the blows to whichthe latter may be subjected, and means for holding the pin againstturning, substantially as described.

2. In a pulley-block, an axial pin made at one end with an enlargementor boss, provided with a peripheral thread and a longi- IOO thus holdsthe axial pin against turning, substantially as described.

ln testimony whereoil we have hereunto affixed our signatures in thepresence of two wit- I5 nesses.

AXEL N. BORQUIST. CHARLES B. BORQUIST.

Yitnesses GEO. E. WALKER, W. H. MARTIN.

